Abstract
Recently obtained by the writer from a series of California Leaf-nose bats (Macrotus californicus) are a number of small parasitic flies. These are members of that little known suborder Pupipara. The majority proved to be Nycterophilia coxata Ferris, 1916. Besides these interesting forms a Trichobius was recovered that appears to be new to science, which is here described and illustrated.
